package com.heima.article.service.impl;

import com.baomidou.mybatisplus.core.toolkit.Wrappers;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.heima.article.mapper.ApArticleConfigMapper;
import com.heima.article.mapper.ApArticleContentMapper;
import com.heima.article.mapper.ApArticleMapper;
import com.heima.article.service.ApArticleService;
import com.heima.article.service.ArticleFreemarkerService;
import com.heima.common.constants.ArticleConstants;
import com.heima.model.article.dtos.ArticleDto;
import com.heima.model.article.dtos.ArticleHomeDto;
import com.heima.model.article.pojos.ApArticle;
import com.heima.model.article.pojos.ApArticleConfig;
import com.heima.model.article.pojos.ApArticleContent;
import com.heima.model.common.dtos.ResponseResult;
import com.heima.model.common.enums.AppHttpCodeEnum;
import lombok.RequiredArgsConstructor;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.lang3.StringUtils;
import org.springframework.beans.BeanUtils;
import org.springframework.context.annotation.Lazy;
import org.springframework.scheduling.annotation.Async;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.Date;
import java.util.List;

@Service
@Slf4j
@Transactional
@RequiredArgsConstructor
@Lazy
public class ApArticleServiceImpl extends ServiceImpl<ApArticleMapper, ApArticle> implements ApArticleService{

    private final ApArticleMapper apArticleMapper;
    private final short MAX_PAGE_SIZE = 50;
    private final ApArticleConfigMapper apArticleConfigMapper;
    private final ApArticleContentMapper apArticleContentMapper;
    private final ArticleFreemarkerService articleFreemarkerService;

    /**
     * 加载文章列表
     * @param dto
     * @param type 1.加载更多 2.加载最新
     * @return
     */
    @Override
    public ResponseResult load(ArticleHomeDto dto, Short type) {
        //参数校验
        Integer size = dto.getSize();
        if(size == null || size == 0) {
            size = 10;
        }
        size = Math.min(size, MAX_PAGE_SIZE);
        dto.setSize(size);

        if(!type.equals(ArticleConstants.LOADTYPE_LOAD_MORE) && !type.equals(ArticleConstants.LOADTYPE_LOAD_NEW)) {
            type = ArticleConstants.LOADTYPE_LOAD_MORE;
        }

        if(StringUtils.isBlank(dto.getTag())) {
            dto.setTag(ArticleConstants.DEFAULT_TAG);
        }

        if(dto.getMaxBehotTime() == null) dto.setMaxBehotTime(new Date());
        if(dto.getMinBehotTime() == null) dto.setMinBehotTime(new Date());

        //查询并返还结果
        List<ApArticle> apArticles = apArticleMapper.loadArticleList(dto, type);
        return ResponseResult.okResult(apArticles);
    }

    /**
     * 保存APP端文章
     * @param dto
     * @return
     */
    @Override
    public ResponseResult saveArticle(ArticleDto dto) {
        //1.检查参数
        if(dto == null) {
            return ResponseResult.errorResult(AppHttpCodeEnum.PARAM_INVALID);
        }

        ApArticle apArticle = new ApArticle();
        BeanUtils.copyProperties(dto, apArticle);

        //2.判断是否存在id
        //2.1不存在id 保存文章、文章配置、文章内容
        if(dto.getId() == null) {
            //保存文章
            save(apArticle);

            //保存配置
            ApArticleConfig apArticleConfig = new ApArticleConfig(apArticle.getId());
            apArticleConfigMapper.insert(apArticleConfig);

            //保存文章内容
            ApArticleContent apArticleContent = new ApArticleContent();
            apArticleContent.setArticleId(apArticle.getId());
            apArticleContent.setContent(apArticleContent.getContent());
            apArticleContentMapper.insert(apArticleContent);
        } else {
            //2.2存在id 修改 文章、文章内容
            //修改文章
            updateById(apArticle);

            //修改文章内容
            ApArticleContent apArticleContent = apArticleContentMapper.selectOne(Wrappers.<ApArticleContent>lambdaQuery().eq(ApArticleContent::getArticleId, dto.getId()));
            apArticleContent.setContent(dto.getContent());
            apArticleContentMapper.updateById(apArticleContent);

        }

        //异步调用，生成静态文件上传到MinIo中
        articleFreemarkerService.buildArticleToMinIO(apArticle, dto.getContent());

        //3.结果返回 文章id
        return ResponseResult.okResult(apArticle.getId());
    }
}
